Paving-block.



W. HANLEY.

Patented June 22, 1909'.

"UNITED sTATns PATENT orricn.

. WILLIAM HANLEY, Ol" BRADFORD, PENNSYLVANIA.

PAVING-BLOCK.

To all whom it may concern:

@Be it known that l, WILLIAM HANLEY, a citizen -of the United States, residing at Bradford, in the county of McKe-an and State of Pennsylvania, have invented certain new anduseful Improvements in Paving- Blocks, of which the following is a specification. ,This invention relates to improvements in ltli pavingvbri'eks or blocks for paving highways, streets, driveways, alleys and walks. Ih'paving highways, it has heretofore been found necessary to erect substantial and per manent curbing on each side of the highway a tobe paved, within which curbing the paving bricks or blocks are laid, the curbing bem necessary because each paving brick ar -b ock is laid loosely in its bed with spaces intervening between each for grouting, as

2 0'-'well as for permitting the laying oi the same loosely where the highway is on a curve, the spaces to be filled with grouting, as' 'well as for permitting the laying of the saidybrick loosely to permit of crowning ott' th'e' center of the highway, the spaces to be filled with grouting: by reason of brick being so laid the curbing has been found necessary to prevent the bricks from loosening in their bed and creeping or sliding toward 36*:ehe sides of the highway. The curbing thus necessary for paving of highways with bricks or blocks adds so largely to the cost thereof that bricks or blocks for paving ,countryflhi'ghways have not been used to any I extent.- During these latter times when travel by automobile and touring car is so extens1Ve, ancl is on the increase, there is a growing demand for better highways, and several of the States respondin to that demand have 40 enacted laws for the building and maintaining: of highways, under which many miles of ihacadam road have been constructed It hasbeen found, however, that the broad and ;;swi-ftly revolving tires of the motor cars suck upiffrom the surface of the macadam road,

small particles of the broken stone and materials forming the same, thus causing much dust to arise and ruts to be worn in the surafaceof themacadam road.

The object of this invention is to provide an improved paving brick or block having in combination features permitting expan- Specification of Letters Patent.

Application filed February 9, 1909. Serial No. 476,945.

Patented June 22, 190i).

sion and contraction of the pavement; uni-, form strength of each paving brick throughnut; pernutting spaces for grouting; pernnttmg interlocking and laying in pavement without use of curbing, thus bringing the cost of the paving down to a limit which will justify to a large extent the use of such )aving blocks, and the elimination of the cust nuisance caused by automobile travel over highways paved therewith.

This invention includes special features of construction hereinafter-described and particularly pointed out in the claims.

An embodiment of the invention is illustrated in the accompanying drawing, formmg part of these specifications, in which- Figure 1 is a erspective view of my improved paving lock; Fig. 2 is a section taken on line y. .6. F1 3 is a central longitudinal section throu a portion of a pavement as laid with said paving blocks.

The blocks A are made rectangular in plan asshown i'n'Fig. 1-, and of such thick ness, width and length as is customary for paving blocks. The blocks are laid on edge in the pavement with their ends pointing cross-ways of the pavement or highway. Two bosses or projections I), beingparaboloid in form or any other suitable form, are molding on one side or face of the paving block. These bos or projections, which may be called males; are in line with. the longitudinal center of the face of the brick or block, as shown by the line w. y. 2-. which is centrally also between the ed es thereof, and each boss is from the ends 0 the paving block a little-less than one-fourth the length of the block; that is, each boss is on each longitudinal side of the center of the face, a distance of halfway from the center to the end, plus about one-eighth of an inch for groutin space at the ends. On the other side 0 each paving block are two depressions 0 corresponding in position to the bosses 'on the reverse side thereof. These depressions, which may be called females, are'in the shape of the concave surface of'a segment of a hollow sphere, and are slightly more shallownindepth than the length of the corresponding'paraboloid bosses on the other side thereof; thus the paving blocks when laidion'edge, facelto fade, so as to break joints, will permit-the male bosses to mesh ing a space between the faces of the blocks when laid. in the pavement, which spaces may befilled with grouting of cement, as-

phalt, or other substance. The blocks when so laid in the pavement also interlock each block with the other, thus holding each other in place'without the need of any curbing at the sides of the 'pavement';lthe interlockthe fiment of eac 'ing of said blocks are-pivotal, one block against the other, by reason ofthe male garaboloi'd bosses being longer than the epth fof the female concave depressions, and the blocks bein in contact only at the oint where the en 4 of the male bosses are in contact with the bottom of the female depressions emitting a transverse movelock reEitive to the-other, thus providing for expansion or contraction of avement. T e special features of construction of my aying block with the male paraholoid osses', and with the female depressions shapedylike the concave surface of a segment of a hollow' sphere, permits of paving blocks so constructed being laid in pavement closely together, leaving onl the required spaces for grouting, etc., an

thus notwithstanding the fa ct of the 1011 it-udinal irregulat shrinkage of the paving locks due to theburning and vitrifying process to which they are subject. -The special features often-- struction of my paving blocks under thisinvention, also preserves and maintains a [uniform thickness, area,mand strength of each block throughout the same, thus re-' ducing the liability to breaka e, liability to breakage' bein an objectiona le feature in other-forms of interlockingor wedgeshaped paving blocks. v

I am aware that bricks have been "made having boss projections on one face thereon, and corresponding recesses formed on the opposite face thereof, but 'so. far as I am aware no bricks have been shaped like mine,

and no bricks have ever been made with the boss PlOJQCtlOnS on one face thereof para- Y boloid in form, while thcdepression's on the 7 other side thereof are shaped like the co1i cave surface of a segment of a hollow sphere, which is anovel feature of my in vention, giving it certain advantage'sover vall paving'blocks of earlier construction, in

that blocks of earlier construction are do- I "signed to lie close and tight upon each other in course, by reason of the bosses on one side thereof being of the same length, breadth and area as the depth, breadth and area of thecorrespondlng depressions .on the other side thereof, which construction-1s unpracshrinkage by so much shifts the relati fit into each other, or to ether in pavement;

'locking feature to obviate the necessity -'o strength, all of w ich features 'in combina- 'tion are obtained by the special construction of the male paraboloid-bosses on one side I claim is:

} goin the burning andvitrifying process to whic they must be'subjected, "and which position of the bosses and depressions that many of the blocks thus made will n I permit of laidg' he novelty of my invention consists; brick or paving block of'the'specialfeatur of construct-ion asdescri'bed, havin in combination when laid inpavement t e inter curbing, together with the feature revent ing the blocks fitting closely or tightly the jf one to the other, (excepting that the out-5 side.,.point or end of the male bosses isin; .contact with the bottom of thecorrespondiing depressions), permittin spaces for grouting, together withthe feature of the blocks lying in place pivotal one with the other, perm tting a transverse movement-'0 each block, and allowing for expansion!!!) M contraction, together with the feature of bosses, because of their peculiar form, havf ing suflicient play longitudinally tithe-(10 9, pressions as will ermit the paving blocks eing laidproper y together in the pave-, ment, notwithstanding the longitudinal ir: regular shrinkage of the blocks while being burned and vitrified, together with the fa- 1 5:1. ture of a -unifo'rm thickness and area of each block throu houf'for the-purpose of thereof, and the femal'e'de ressionsshaped .i like the concave surface o a'segmen't of ahollow sphere on the other side thereof, as, herein described. a I Having thus described myinvention, what"- "1. A paving brick having projections on; one of its sides and depressions out o oppo' site side thereof, said projections being Ofi; greater length and less width than the do-@11 pressions whereby contact is permitted be-' tween the end of the projections and the bot tom of the depressions of vadjacent blocks,

the difference in width allowing for contrace-F 7 tion and expansion and iii larities in; manufacture, substantially asd c s cribed 2. A paving brick having projections 011 one of its faces paraboloid 1n form, andjdo pressions on the opposite faeecorresponding 1 in position, said projections, by reasorifj'oit their-shape, contacting at their ends with" the bottom of the recesses of adjacent blocks, but leaving a space between their adjacent-1 walls, substantially as described. 3. A pavement comprising a series of blocks, each block having promotions on one of its faces and depressions on its opposite terfering With the interlocking sction, subface so as to interlock with adjacent blocks, stantially as described. 7 10 the projections bein of greater length and In testimony whereof I alfix my'signature less width than the depressions, whereby an in presence oftwo Witnesses.

interlocking structure is secured, rendering WILLIAM HANLEY. unnecessary the use of curbing and at the Witnesses:

- same time providing for irregularities in EDWIN E. TAIT,

manufactureysuch as shrinkage, without 1n-' KATHARINE BURKE. 

